.banner{
    position: relative;
    width: 710px;
    height: 300px;
    margin: auto;
    background-color:skyblue;
    overflow: hidden;
}
.banner .banner-list{
    position: absolute;
    left: 0;
    top: 0;
}
.banner .banner-dian{
    position: absolute;
    bottom: 10px;
    right: 20px;
}
